Wrist-pin bearing



Dec. 27, 1927. 1,654,210

c. c. CHOWDER WRIST PIN BEARING Filed May 20. 1927 Inventor ArtormgyPatented Dec. 27, 1927.

UNITED STATES CLARENCE G. CHOWDER, OF BESTi TEXAS.

WRIST-PIN BEARING.

Application 1115a May 20,

The present invention relates to a wrist pin bearing and has for itsprincipal object to provide a structure which may be easily and readilyincorporated in the pitman.

A still further important object of the in vention lies in the provisionof a device of this nature which is simple in its construe tion,inexpensive to manufacture, strong and durable, eflicient and reliablein use, and otherwise well adapted to the purpose for which. it is desined.

With the above and numerous other objects in view as will appear as thedescription proceeds, the invention resides in certain novel features ofconstruction, and in the combination and arrangement of arts as will behereinafter more fully described and claimed.

In the drawing:

Figure 1 is an elevation showing a pitman with my improved wrist pinbearingmounted. therein,

Figure 2 is a side elevation of the wrist pin bearing,

Figure 3 is a sectional view tl'ierethrough, and,

Figure 1 is a top plan view thereof.

Referring to the drawing in detail it will be seen that the numeral 5denotes a pitman having the usual opening therein to receive the wristpin hearing. The numeral 6 de notes the lower segment of the hearingwhich is provided with depending ears 7 at its ends which may be boltedas at 8 or otherwise secured to the sides of the pitman 5. This segment6 is formed with a semi-cylindrical recess 9 which receives asemi-cylindrical bushing 10. Flanges 11 rise from the side edges of thesegment 6 a distance from the recess 9 as is clearly illustrated inFigure 8. The numeral 12 denotes the upper segment which has asemi-cylindrical recess 13 for receiving a semi-cylindrical bushing 14to complete the bore of the bearing for receiving the wrist pin.Projections 15 depend from the segment 12 one on each side of the recess13 to be received between the flanges 11. A rib 17 extends across thetop of the segment 12 and has an opening for receiving the parallelopipeportion 18 which extends transversely thereof and terminates in roundedthreaded extensions 19. The center portion of the parallelopipe portion18 is provided with a lug 20 rising therefrom. A cap 21 fits over therib 17 and has notches 1927. .SerialNo. 192,994.

18 to receive theparallelopipe portion 18. This cap 21 is held in placeby bolts 22 or in any other suitable manner. The rib and the segment 12are provided with an orifice 23 for receiving a grease cup or the likeas is shown. at 241 so that the wrist pin in the busl'iing structure 1U,14. may be lubricated. The structure 18, .19, has its portion ll'projecting beyond the edges of the pitman 5 in order that links 26 maybe engaged thereon. 'llurnbuckles 27 areengaged with links 26 and links28 are engaged with the turnbuckles and with a strap structure 29 fixedto the bottom of the pitman. Thus by turning these turnbuckles whichhave an opposite tl'ireaded engagement with the links 26 and 28respectively, the straps may be tightened and the wrist pin hearing heldfirmly in place.

It is thought that the construction, opera tion, utility, and advantagesof this i11ve11-- tion will now be quite apparent to those skilled, inthis art without a more detailed description thereof. It will be seenthat the upper segment 12 of the bearing structure may be removedwithout disturbing the lower portion thereof and the bushings may berenewed if necessary. Thus the device capable of easy installation andreplacement.

The present embodiment of the invention has been disclosed in detailmerely by Way of example since in actual practice it attains thefeatures of advantage enumerated as desirable in the statement of theinvention. and the above description. It will be apparent that changesin the details of construction, and in the combination and arrangementof parts may be resorted to without departing from the spirit or scopeof the invention as hereinafter claimed or sacrificing any of itsadvantages.

Having thus described my invention, what I claim as new is 1. A wristpin bearing structure of the class described cmnprising a lower segmenthaving a recess in its upper portion for re ceiving a bushing segment,flanges rising from the upper face of the lower segment, one on eachside of the recess, an upper seg ment having a recess in its lower faceto receive a bushing segment, flanges projecting downwardly from thelower face of the upper segment one on each side of its recess andadapted to be received between the flanges on the other segment, saidupper segment being provided with'a rib on its upper face extendinglongitudinally with the recess therein and formed with a centralopening, a bolt-like structure receivable in the central opening andhaving a center parallelopipe structure having rounded ended extensions,and means for holding said bolt-like structure in place.

2. A wrist pin bearing structure of the class described comprising alower segment having a recess in its upper portion for receiving abushing segment, flanges rising from the upper face of the lowersegment, one on each side of the recess,an upper segment having a recessin its lower face to receive a bushing segment, flanges projectingdownwardly from the lower face of the uppersegment one on'each side ofits recess and adapted to be received between the flanges on the othersegment, said upper segment being provided with a rib on its upper faceextending longitudinally with the recess therein and formed with acentral opening, a bolt-like structure receivable in the central openingand having a center parallelopipe structure having rounded endextensions, and means for holding said blt-like structure in place, saidmeans comprising a cap and fastening element for holding said cap inplace over the rib and over the bolt-like structure.

3. A wrist pin bearing structure of the class described comprising alower segment having a recess in its upper portion for receiving abushing segment, flanges rising from the upper face of the lowersegment,

one on-each side of the recess, an upper segment having a recess in itslower face to receive a bushing segment, flanges pro'ecting downwardlyfrom the lower face 0 the upper segment one on each side of its recessand adapted to be received between the flanges on the other segment,said upper segment being provided with a rib on its upper face extendinglongitudinally with the recess therein and formed with a centralopening, a bolt-like structur-e receivable in the central opening andhaving a center parallelopipe structure having rounded end extensions,and means for holding said bolt-like structure in place, said means com)rising a cap and fastening element for hol ing said cap in place overthe rib and over the bolt-like structure, the lower bearing segmentbeing provided with dependin ears.

In testimony whereof I afiix my signature.

CLARENCE C. CROWDER.

